/* CoralCube | Massively Multiplayer Online Role-Playing Game(MMORPG) Emulator.
|* 
|* Copyright (C) 2005-2010 MaNGOS <http://getmangos.com/>
|*               2008-2010 TrinityCore <http://www.trinitycore.org/>
|*               2008-2010 CoralCube <http://www.CoralCube.com/>
|*
|* This program is free software. You can redistribute it and/or modify it under the terms of 
|* the GNU General Public License as published by the Free Software Foundation, either 
|* version 2 of the License.
|*
|* This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY, 
|* without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. 
|* See the GNU General Public License for more details.
|*
|* You should have received a copy of the GNU General Public License along with this program. 
|* If not, see <http://www.gnu.org/licenses/>.
|*/

#ifndef CORE_FORMULAS_H
#define CORE_FORMULAS_H

#include "World.h"
#include "SharedDefines.h"
#include "ScriptMgr.h"

namespace Core
{
    namespace Honor
    {
        inline float hk_honor_at_level_f(uint8 level, float multiplier = 1.0f)
        {
            float honor = multiplier * level * 1.55f;
            sScriptMgr.OnHonorCalculation(honor, level, multiplier);
            return honor;
        }

        inline uint32 hk_honor_at_level(uint8 level, float multiplier = 1.0f)
        {
            return uint32(ceil(hk_honor_at_level_f(level, multiplier)));
        }
    }
    namespace XP
    {
        inline uint8 GetGrayLevel(uint8 pl_level)
        {
            uint8 level;

            if (pl_level <= 5)
                level = 0;
            else if (pl_level <= 39)
                level = pl_level - 5 - pl_level / 10;
            else if (pl_level <= 59)
                level = pl_level - 1 - pl_level / 5;
            else
                level = pl_level - 9;

            sScriptMgr.OnGrayLevelCalculation(level, pl_level);
            return level;
        }

        inline XPColorChar GetColorCode(uint8 pl_level, uint8 mob_level)
        {
            XPColorChar color;

            if (mob_level >= pl_level + 5)
                color = XP_RED;
            else if (mob_level >= pl_level + 3)
                color = XP_ORANGE;
            else if (mob_level >= pl_level - 2)
                color = XP_YELLOW;
            else if (mob_level > GetGrayLevel(pl_level))
                color = XP_GREEN;
            else
                color = XP_GRAY;

            sScriptMgr.OnColorCodeCalculation(color, pl_level, mob_level);
            return color;
        }

        inline uint8 GetZeroDifference(uint8 pl_level)
        {
            uint8 diff;

            if (pl_level < 8)
                diff = 5;
            else if (pl_level < 10)
                diff = 6;
            else if (pl_level < 12)
                diff = 7;
            else if (pl_level < 16)
                diff = 8;
            else if (pl_level < 20)
                diff = 9;
            else if (pl_level < 30)
                diff = 11;
            else if (pl_level < 40)
                diff = 12;
            else if (pl_level < 45)
                diff = 13;
            else if (pl_level < 50)
                diff = 14;
            else if (pl_level < 55)
                diff = 15;
            else if (pl_level < 60)
                diff = 16;
            else
                diff = 17;

            sScriptMgr.OnZeroDifferenceCalculation(diff, pl_level);
            return diff;
        }

        inline uint32 BaseGain(uint8 pl_level, uint8 mob_level, ContentLevels content)
        {
            uint32 baseGain;
            uint32 nBaseExp;

            switch (content)
            {
            case CONTENT_1_60:
                nBaseExp = 45;
                break;
            case CONTENT_61_70:
                nBaseExp = 235;
                break;
            case CONTENT_71_80:
                nBaseExp = 580;
                break;
            default:
                sLog.outError("BaseGain: Unsupported content level %u",content);
                nBaseExp = 45;
                break;
            }

            if (mob_level >= pl_level)
            {
                uint8 nLevelDiff = mob_level - pl_level;
                if (nLevelDiff > 4)
                    nLevelDiff = 4;

                baseGain = ((pl_level * 5 + nBaseExp) * (20 + nLevelDiff) / 10 + 1) / 2;
            }
            else
            {
                uint8 gray_level = GetGrayLevel(pl_level);
                if (mob_level > gray_level)
                {
                    uint8 ZD = GetZeroDifference(pl_level);
                    baseGain = (pl_level * 5 + nBaseExp) * (ZD + mob_level - pl_level) / ZD;
                }
                else
                    baseGain = 0;
            }

            sScriptMgr.OnBaseGainCalculation(baseGain, pl_level, mob_level, content);
            return baseGain;
        }

        inline uint32 Gain(Player *pl, Unit *u)
        {
            uint32 gain;

            if (u->GetTypeId() == TYPEID_UNIT &&
                (((Creature*)u)->isTotem() || ((Creature*)u)->isPet() ||
                (((Creature*)u)->GetCreatureInfo()->flags_extra & CREATURE_FLAG_EXTRA_NO_XP_AT_KILL) ||
                ((Creature*)u)->GetCreatureInfo()->type == CREATURE_TYPE_CRITTER))
                gain = 0;
            else
            {
                gain = BaseGain(pl->getLevel(), u->getLevel(), GetContentLevelsForMapAndZone(u->GetMapId(), u->GetZoneId()));

                if (gain != 0 && u->GetTypeId() == TYPEID_UNIT && ((Creature*)u)->isElite())
                {
                    // Elites in instances have a 2.75x XP bonus instead of the regular 2x world bonus.
                    if (u->GetMap() && u->GetMap()->IsDungeon())
                        gain = uint32(gain * 2.75);
                    else
                        gain *= 2;
                }

                gain = uint32(gain * sWorld.getRate(RATE_XP_KILL));
            }

            sScriptMgr.OnGainCalculation(gain, pl, u);
            return gain;
        }

        inline float xp_in_group_rate(uint32 count, bool isRaid)
        {
            float rate;

            if (isRaid)
            {
                // FIXME: Must apply decrease modifiers depending on raid size.
                rate = 1.0f;
            }
            else
            {
                switch (count)
                {
                case 0:
                case 1:
                case 2:
                    rate = 1.0f;
                    break;
                case 3:
                    rate = 1.166f;
                    break;
                case 4:
                    rate = 1.3f;
                    break;
                case 5:
                default:
                    rate = 1.4f;
                }
            }

            sScriptMgr.OnGroupRateCalculation(rate, count, isRaid);
            return rate;
        }
    }
}
#endif
